Backlinks previously relied on scanning allContent (raw markdown), which
was empty in Tauri mode until notes were explicitly saved. Now outgoing
wikilink targets are extracted during Rust vault scan and stored on
VaultEntry. The frontend useBacklinks hook uses this indexed data, and
outgoingLinks update in real-time on content change.
- Add extract_outgoing_links() in Rust parsing + outgoing_links field on VaultEntry
- Add extractOutgoingLinks() TypeScript utility for real-time updates
- Rewrite useBacklinks to use outgoingLinks instead of scanning raw content
- Add cache version invalidation to force rescan on format change
- Extract useEditorSaveWithLinks hook to keep App.tsx under code health threshold
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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